From cb3b2fc4390e8d51b09ff085e20e0b6589e75285 Mon Sep 17 00:00:00 2001
From: Alkis Evlogimenos <alkis@evlogimenos.com>
Date: Tue, 20 Jul 2004 13:28:17 +0000
Subject: [PATCH] Add function to clear all virtual->physical mappings but not
 assigned stack slots. This is in preparation for the iterative linear scan.

llvm-svn: 15032
---
 lib/CodeGen/VirtRegMap.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h
index e9bfe76d4bf..c76a222341e 100644
--- a/lib/CodeGen/VirtRegMap.h
+++ b/lib/CodeGen/VirtRegMap.h
@@ -87,6 +87,11 @@ namespace llvm {
             v2pMap_[virtReg] = NO_PHYS_REG;
         }
 
+        void clearAllVirt() {
+            v2pMap_.clear();
+            grow();
+        }
+
         bool hasStackSlot(unsigned virtReg) const {
             return getStackSlot(virtReg) != NO_STACK_SLOT;
         }